Dumbbell Seated Single Arm Overhead Triceps Extension (Left)
Dumbbell Seated Single Arm Overhead Triceps Extension (Left) Exercise Description
The dumbbell seated single-arm overhead triceps extension targets the triceps brachii of the working arm, with particular emphasis on the long head due to the overhead shoulder position and stretch. Seated posture increases trunk stability, helping you keep a neutral spine while the left arm performs controlled elbow extension. The goal is to move only at the elbow: the upper arm stays close to the head, vertical, and stable. Deltoids, the rotator cuff, and scapular stabilizers assist in maintaining the overhead arm position, while the core prevents rib flare and lumbar arching. This exercise is useful for focused triceps work and for developing unilateral control and symmetry.
- Muscle Groups: Triceps
- Target Muscles: Triceps Brachii - Long Head
- Assisting Muscles: Triceps Brachii - Lateral Head, Triceps Brachii - Medial Head
- Stabilizing Muscles: Deltoid - Anterior, External Obliques, Serratus Anterior, Subscapularis, Trapezius - Lower Fibers
- Body Area: Upper Body
- Body Parts: Arms, Upper Arms
- Body Surface: Back
- Body Symmetry: Unilateral
- Equipment: Dumbbell
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Elbow Extensors
- Joint Involvement: Single-joint
- Muscle Location: Inner Tricep
- Movement Direction: Vertical
- Muscle Position: Posterior
- Gender: Male
How To Do The Dumbbell Seated Single Arm Overhead Triceps Extension (Left) Exercise
‘- Sit tall on a bench with feet flat, ribs stacked over pelvis, and a neutral spine.
– Hold a dumbbell in the left hand and bring it to an overhead position; biceps near your ear, elbow pointing forward.
– Set the shoulder: slight upward rotation of the scapula, avoid shrugging, keep neck neutral, brace lightly through the torso.
– Keep the left upper arm vertical and close to your head; move only at the elbow.
– Lower the dumbbell behind your head under control until you feel a triceps stretch; avoid rib flare or back arch.
– Maintain a neutral wrist (no bending); forearm follows a smooth arc.
– Extend the elbow to return the dumbbell overhead; finish tall without a hard lockout.
– Keep the elbow pointing generally forward throughout; do not let it flare wide.
– Use the right hand to assist getting the dumbbell into and out of the overhead position safely.
– Avoid common faults: torso leaning, chin jutting, shifting upper arm, or bouncing the weight.
Dumbbell Seated Single Arm Overhead Triceps Extension (Left) Tips
‘- Sit tall on the bench with feet flat, ribs stacked over pelvis, and a neutral spine.
– Set the shoulder before and during the set: slight upward scapular rotation, avoid shrugging, keep the neck neutral, and brace lightly through the torso.
– Keep the left upper arm vertical and close to your head, with the biceps near your ear.
– Move only at the elbow; keep the torso from leaning or shifting as you perform the rep.
– Lower the dumbbell behind your head under control until you feel a triceps stretch, without bouncing the weight.
– Keep the elbow pointing generally forward as you lower and lift; do not let it flare wide or drift.
– Maintain ribs stacked over the pelvis and avoid rib flare or arching the lower back as the weight descends.
– Hold a neutral wrist with no bending while the forearm follows a smooth arc.
– At the top, extend the elbow to return the dumbbell overhead, finishing tall without a hard lockout.
– Use the right hand to assist the left arm in getting the dumbbell into and out of the overhead position.
Dumbbell Seated Single Arm Overhead Triceps Extension (Left) Beginner Introduction
The dumbbell seated single-arm overhead triceps extension is a focused arm exercise performed seated on a bench with a dumbbell held in one hand. With the working arm reaching overhead, the movement emphasizes bending and straightening at the elbow while the upper arm remains relatively steady beside the head. This overhead position places the triceps under a strong stretch, especially through the long portion of the muscle, creating a concentrated challenge for the back of the upper arm. The other hand often assists in getting the weight into place so the overhead start feels more secure.
Because it is done sitting, the exercise naturally encourages a tall, stable posture, with the torso and hips providing a solid base. The shoulders, rotator cuff, and upper back contribute to holding the arm overhead, while the core supports a calm, controlled midsection rather than excessive arching. The single-arm setup highlights left–right differences and promotes better control on each side, making this movement useful for building more balanced strength and refined technique in the triceps.